Off Grid Living: What Would It Take For a Family Of Four?

When I was little, I remember sitting around the kitchen table with my grandfather while he plotted how much land he would need to sustain his home off the grid. The man was a dreamer, but accordin

When I was little, I remember sitting around the kitchen table with my grandfather while he plotted how much land he would need to sustain his home off the grid. The man was a dreamer, but according to this graphic from 1BOG, he wasn't far off. Do you know what it would take for a family of four to live in this manner?